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| 1 | Effects of levonorgestrel-quinestrol(EP-1)treatment on Mongolian gerbil wild populations:a case study显示文摘Rodent pest population outbreaks occur frequently in grassland ecosystems in northern China.The Mongolian gerbil(Meriones unguiculatus)is a dominant pest rodent which is distributed across the semi-desert grasslands of Inner Mongolia,China.In 2009,we studied the contraceptive effect of levonorgestrel-quinestrol(EP-1),concentration 50 ppm,on a wild Mongolian gerbil population.The one-off contraceptive treatment was compared with a control group using a semi-monthly live trapping method in the Ordos Semi-desert Grassland Region of Inner Mongolia.The results show that juveniles were not recruited in spring in the treatment group.Ratios of juveniles in the control and treatment groups showed significant semi-monthly differences from spring to summer(one-way ANOVA,F_(2,14)=7.53,P<0.05).Between both groups,annual fluctuations of juvenile and total population densities were significantly different respectively(F_(2,14)=4.64,P<0.05;F_(2,18)=7.72,P<0.05).The contraceptive EP-1 delayed the normal reproductive pattern of Mongolian gerbil populations.This suppressed birth rates of gerbil populations,reduced their densities,and changed their age structures.The period of EP-1 baiting should be extended but it could be an ideal method for controlling Mongolian gerbil populations during each breeding season. | Heping FU Jinwei ZHANG Dazhao SHI Xiaodong WU | 2013 | Integrative Zoology2013，8，3： | 2 |
| 2 | Fertility control of Rattus nitidus using quinestrol:effects on reproductive organs and social behavior显示文摘Fertility control has been identified by studies in the laboratory and the field as a more appropriate and long-term control strategy for rodent pests than lethal control.In this study,we investigated the effects of quinestrol on mass of reproductive organs and on social behaviors in female and male Himalayan field rats(Rattus nitidus).A total of 16 adult females and 16 adult males were randomly assigned to 4 groups.One male and one female group were fed rice with 0.005%quinestrol by weight for 7 days,and another 2 groups were fed rice only.After 7 days,rats were assigned to 10 min dyadic encounters between groups,and investigation,aggression,defense and attack latency were quantified.All animals were killed on day 10,and reproductive organs were dissected and weighed.Dyadic encounter data showed that there were obvious changes in social behaviors of quinestrol-treated rats.Quinestrol significantly inhibited the investigative behavior of quinestrol-treated males toward control females in Rattus nitidus,but seldom affected investigation between control males and quinestrol-treated females.Aggression of control females toward quinestrol-treated males was higher than that of quinestrol-treated females,and defense of quinestrol-treated males toward control females was more remarkable than that of control males.Quinestrol remarkably decreased wet masses of epididymis and spermotophore in males and ovaries in females,but had no effect on wet masses of testes and uteri after quinestrol treatment.These results indicate that the anti-fertility effects of quinestrol on R.nitidus are attributed to not only suppressing reproductive organs but also impacting social behaviors associated with territory defense and mate choice. | Quansheng LIU Jiao QIN Qin CHEN Deng WANG Dazhao SHI | 2013 | Integrative Zoology2013，8，1： | 2 |
| 3 | Simulation of le- thal and fertility control in a demographic model for Brandt's vole Microtus brandti 显示文摘 | Shi Dazhao Wan Xinrong Davis S | 2002 | Journal of Applied Ecology2002，39，： | 1 |
| 4 | The effects of quinestrol as a con- traceptive in mongolian gerbils (meriones unguiculatus ) 显示文摘 | LU Xiaohui SHI Dazhao | 2011 | Experimental animal2011，60，5： | 1 |
| 5 | Inhibitive effects of quinestrol on male testes in mongolian gerbils (mer- ionesunguiculatus)显示文摘 | SHEN Wei SHI Dazhao WANG Deng | 2012 | Research in veterinary science2012，93，2： | 1 |
| 6 | Effects of quinestrol and levonorgestrel on prolaetin serum concentra- tion in lactating mongolian gerbils (meriones unguiculatus) and reproductive parameters of their offspring显示文摘 | LU Xiaohui GUO Yongwang SHI Dazhao | 2012 | Reproduc- tive biology2012，12，3： | 1 |
| 7 | Isolation and characterization ofpolymorphic microsatellite loci from Brandt ’ s voles(Lasiopodomys brandtii) 显示文摘 | Wang Deng Shi Dazhao | 2007 | Molecular Ecology Notes2007，7，4： | 1 |
| 8 | Empirical Effective Interaction in 22MeV Proton Scattering显示文摘Inelastic differential cross sections of 22 MeV proton scattering for 5 excited states of 28Si have been measured from 10°to 115°.Empirical effective interactions were extracted within the frame of DWBA from the normal parity state data which transition densities were known from electron scattering.The fitting is good except for the forward angle of 4^(+)_(1) and 0^(+)_(2) states.The results are discussed. | AN Zhu CHEN Quan DING Dazhao SHI Zongren WAN Shuyang GAO Keyang | 1994 | Chinese Physics Letters1994，11，7： | 0 |
| 9 | Verification of the Orbital Character of Low-Lying M1 Excitation Mode in ^(160)Gd by 22MeV Proton Inelastic Scattering at a Forward Angle显示文摘By 22MeV proton inelastic scattering at the forward angle of 10°,the orbital character of new low-lying M1 excitation states in ^(160)Gd has been verified.At the same time,several new energy levels of ^(160)Gd are observed,and values of spin,parity and deformation length for two new energy levels with excitation energies of 2.558 and 2.607 MeV are given via collective distorted wave Born approximation calculations. | AN Zhu SHI Zongren CHEN Quan DING Dazhao | 1995 | Chinese Physics Letters1995，12，11： | 0 |
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